[Mimedefang] sendmail spf milter plugin for sendmail 8.13.0
Jeff Rife
mimedefang at nabs.net
Thu Aug 19 02:19:08 EDT 2004
On 18 Aug 2004 at 13:20, Matthew.van.Eerde at hbinc.com wrote:
> > This then breaks forwarding, one of the advantages of DomainKeys over
> > SPF.
>
> How so? Email forwarding works, so long as the forwarding agent (say,
> forwarder.example.com) signs the forwarded email with their DomainKey.
You haven't read the spec enough. To do this, the forwarder would have
to change the "From:" header. Although this is benign, this is a type
of forgery of the "From:" header, and forgery of the "From:" header is
what DomainKeys is supposed to stop.
--
Jeff Rife | "Damn it, I miss the sound of her voice. I tried
SPAM bait: | putting silverware down the disposal, but it
AskDOJ at usdoj.gov | wasn't the same."
spam at ftc.gov |
| -- Ned Dorsey, "Ned and Stacey"
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